Treatment of fabrics during weaving.



E. PREIN.

TREATMENT OF FABRICS DURING WEAVING.

APPLIGATION FILED DEC. 30, 1912.

Patented July 28, 1914-,

Javenfar fiffnesaes OMAL f' THE NORRIS PETERS CO. PHOTKILITHOH WASHINGTON, D. C.

' UNITED STATES PATENT OFFICE.

EMIL PREIN, 0F HANOVER, GER-MANY, ASSIGNOR TO PREIN-GEWEBE AC'IIEN- GESELLSCI-IAFT, 0F HANOVER-LINDEN, GERMANY, A FIRM.

TREATMENT OF FABRICS DURINGWEAVING.

Specification of Letters Patent.

Patented July 28, 1914.

Original application filed September 9, 1910, Serial No. 581,200. Divided and this application filed December Serial No. 739,361.

To all whom it may concern Be it known that I, EMIL PREIN, mechanical engineer, subject of. the German Emperor, residing at Gellertstrasse 55, Hanover, Germany, have invented new and useful Improvements in the Treatment of Fabrics During Weaving, of which the following is a specification.

The subject of the present invention is divided from the application dated September 9th. 1910, Serial No. 581200, of which it originally formed a part.

As is well known, during the weaving of fabrics the fibers become loose from the yarn, even when they have been first connected together by some preparation or are woven by the wet process. In the case of the fibers of the warp yarn, this takes place owing to the strong mutual friction during the formation of the shed and to the reciprocation of the reed, in the case of the fibers of the weft yarn, owing to the sudden cessation of the adhesion between the fibers caused during the picking of the weft and by the very rapid unwinding of the yarn and by the attraction between the yarn remaining on the shuttle and that which is being unwound. The fibers which are then still projecting from the surface of the fabric are removed by shearing, singeing and cleaning machines in order to make the fabric suitable for various purposes. In this way the fabric loses not only a large number of fibers which would otherwise offer great resistance to tearing, but the weaving in of fibers which tend to become loose, and the violent removal of those which project, results in seri ous drawbacks. During shearing, the very sharp cutters which work at high speed not only remove the projecting fibers but also out little knots and threads off, which damage is not at first noticeable and only shows unfavorable results when the fabric is tested as to its resistance to tearing as a completed length. In the singeing process it is the heat, generally acting suddenly on the fabric, which makes all the fibers brittle, more particularly the single cell cotton fibers. A further important drawback is that the fibers which have been Woven in a curved and crushed state, remain in the fabric with a spreading force which has not been weakened in any way. If the woven material is treated later on for any technical purpose the fibers become loose andproject from the fabric as position to each other. Even ifthe curved fibers and hairs are held during drying by mechanical pressure, which, as is well lmown in practice, is carried out in different ways in various fabrics, according to the purpose for which they are intended, they are merely held fast but not weakened. They will also in this case gradually become loose and de tached from their bed owing to the irregular movement of the fabric, changeable temperature and varying strains set upon the fabric with disadvantageous results.

The process of the present invention here inafter described, is intended to avoid the drawbacks in question. In this process the weft threads are rubbed with a moistened pad or the like immediately before being woven into the fabric, in such manner that all fibers are caused to adhere straightened to their threads, in which position they are held by the threads when woven together. It is therefore of especial importance that the laying down of the fibers takes place exactly at the place where, and at the moment when no further fiber loosening forces are brought to operate on the threads. As a material for laying down the fibers, moistened rubber sponge may for instance be used.

The invention may be carried out in a variety of ways.

One construction of apparatus for carrye ing out this invention is illustrated in the accompanying drawing.

The shuttle a may be of any well known construction, but preferably slightly longer as it has to contain several parts in addition to those it normally carries. It has two drlzo mpartments p in which is arranged a pa 7..

One space p through which the thread leaving the cop .9 must pass, is adjacent to a liquid chamber 1*, from which it is only separated by a perforated plate 9. The pad z in this space is therefore always kept moist. The pad '5 in the second space is not directly moistened by the liquid but serves to complete the drawing out and laying down of the moistened fibers on the threads. The

threads are led from the cops .9 through holes in the sides of the spaces 20. In order to enable the thread to be passed through the pads 2' these are divided so that the parts may be separated when the shuttle is opened, and the thread passed through the holes.

The weaving is effected in the usual manner. The picking of the weft threads is also effected in the well known manner.

During the passage of the shuttle 2 through the shed, the liquid from the chamher 1 is shaken up by the striking of the driver and thereby passes through the perforated plate 9 and into the space 27. At the same time the yarn runs from the cop 8 through eyes into the two superimposed compartments 7) and through the pads i. In the first space the fibers projecting from the threads are moistened and are also slightly rubbed; in the second space the fibers receive a final rubbing so that all the fibers are laid down on the thread, Immediately the thread leaves the shuttle, that is at the instant when the fibers are adhering' firmly to the thread, it is caught between the warp threads and held fast, so that the fibers can no longer free themselves. hen the woven material is dried the fibers are held fast.

The fabric thus manufactured is better able to resist mechanical strains than that manufactured in the usual manner and more particularly fulfils modern requirements, where it is important to have a smooth fabric as, for instance, those used in the in one direction at the point at which the threads are woven into the fabric, and moistening or damping said threads to secure to said threads the fibers laid down by the brushing. I

2. A process for treating weft threads of a fabric, consisting in laying down the fibers projecting from the threads at the point at which the weft threads are woven into the fabric, and securing said fibers tosaid weft threads by moistening.

3 A process for treating the weft threads of a fabric, consisting in simultaneously moisten-ing said threads and brushing them in one direction at the point where the threads are woven into the fabric.

4. A process for treating the weft threads of a fabric, consisting in damping or moistening a pad and applying said pad in one direction to the threads at the point where the latter are woven into the fabric.

In testimony whereof I have signed my name to this specification in the presence of twosubscribing witnesses.

v EMIL PREIN.

l Vitnesses MAR-11v Korma,

GUSTAV Bonsai.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents,

Washington, D: 0". 

